Improvement in harvesters



G. .5.- cHEN0wETH.

Harvester.

Patented Feb. 1859-.-

UNITED STATES GEO. E. GHENOWETH, OF BALTIMORE, MARYLAND.`

IMPROVEM ENT IN HARVESTERS.

Specification forming part of Letters Patent N 0. 212,855,` datedFebruary v8, 185.9.

` To a/ZZ whom it may concern:

improvements. Fig. 2 is a vertical section from front to rear on line.fr x of Fig. l, and Fig. 3 is afront view of the jawlever.

The same letter marks the same part in all the figures.

The nature of my invention consists in the construction and arrangementof parts, hereinafter more particularly described, for the better andmore convenient communication of the power of the driving-wheel to t-heknifebar of the machine.

In the drawings, A represents the spurwheel attached to the largedriving-wheel of the machine; B, the pinion on the end of camshaft; O,the cam-shaft; l) D, the journals in which the cam-shaft turns; E E',shells of the cam-cylinder; F, feather on cam-shaft on which E E slide;G G', frictionrollers on transverse arms of slide-bar; H, slide-bar; I,jawlever; K, knife-bar; L, guide -bar in which bar H slides; M, bracketto which jaw lever I is pivoted.

a marks the jaw orslot in the upper end at lever I; b, the slot in thelower end of lever I; h, the transverse arm of slide-barH.

. The spur-wheel A is attached to the driving-wheel in the usual way. Itcommunicates motion to pinion B on the end of the camshaft. The shells EE of the cam-cylinder are independent of each other, and are held firmlyon their shaft by the feather F on said shaft. They are 'adjustable bymeans of nuts,

by which they may be approximated whenever required to compensate forwear. The camgroove between the shells receives frictionroller G on theforward end of the cross-arm h of slide-bar H. This arm extends throughbar H, and has a friction-roller, G', on its rear end, which playsbetween guides in the rear part of box L. Just behind roller G cross'-arm h is received by the jaw a in' the upper end of the lever I. The barH slides-in slots in the ends of guide-box L. The lever I is .pivoted tobracket M, as shown in Fig. 2, and has a slot, b, in its lower end, (seeFig. 3,) for the reception of a pin passing through a jaw in the end ofthe knife-bar K, which fits loosely over the slotted end of I.

The operation is as follows: As the cam cylinder revolves itcommunicates a transverse reciprocating motion to the slide-bar Hthrough the cross-arm h. This arm also impartsa vibratory movement tolever I, which works the knife-bar K.

The advantages of this improvement are simplicity of construction,directness of action, compensation for wear, and prevention of thatuncertainty of stroke which has been so .important an objection tocammachines.

I do not claim making the shells of the camcylinder adjustable tocompensate for wear, as that has been secured to Ine in a former patent;but

What I do claim is- Y,

1. The combination of the cam-cylinder with the cross-arm, slide-bar,and slotted or jaw lever, constructed, arranged, and operatingsubstantially in the man ner and applied to the purpose specied.

2. A slide-bar having two crossarms provided with friction-rollers andworking inthe slotted box L, as described.

The above specification signed and wit-- nessed this 5th day of January,A. D. 1859.

Y GEO. E. CHENOWETH. Witnesses:

VCHARLES. E. NEEDLEs,' Trios. PETERS, Jr.

